A look at N. Korea's nuclear, missile developments in 2016

North Korea has conducted its fifth nuclear test on Friday, just eight months after it claimed it successfully detonated a small hydrogen bomb. Analysts say that the North's newest test, which South Korea says produced its biggest-ever explosive yield, shows Pyongyang's stubborn determination in face of sanctions to create smaller and lighter nuclear weapons that could be fit on future missiles capable of striking the U.S. mainland. …